p(x)=(x3−1,2x4+2x3+7x2+5x+5) is the greatest common divisor of
x3−1 and 2x4+2x3+7x2+5x+5 .
Find p(x) according to Euclid's algorithm
2x4+2x3+7x2+5x+5:x3−1
2x4+2x3+7x2+5x+52x4−2x2x3+7x2+5x+52x3−27x2+7x+7x2+x+1∣x3−12x+2
x3−1:x2+x+1
x3−1x3+x2+x−x2−x−1−x2−x−10∣x2+x+1x−1
Then p(x)=x2+x+1 .
Q[x]/p(x)=Q[x]/<x2+x+1> .
The set Q[x]/p(x) the product of polynomials from Q[x] by p(x)=x2+x+1 .
We are obsessed with polynomials Q[x] .
Then Q[x]/p(x)=Q[x]/Q[x]={0}
It is not a field, because there x2+x+1=0
Answer: p(x)=x2+x+1 , Q[x]/I is not a field
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Dear Ram, please use the panel for submitting new questions.
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Dear Ram, please use the panel for submitting new questions.
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